Improvement in circular-saw mills



TITUS H. RUSSELL, OF NORTHFIELD, VERMONT.

Letters Patent No. 106,729, dated August 23, 1870; aatedated August 17,1870.

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IMPROVEMENT IN' CIRCULAR-SAW MILLS.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom it may concern:

e it. known that I, TITU's H. RUSSELL, ofNorthiield,`in the county ofWashington, and'St-ate of Vermont, have invented a new and usefulImprovement in Circularsaw Machines; and I do hereby declare that thefollowing is a full, clear, and exact description thereof', which willenable others skilled in the art to make and use the same, referenceheilig had to the accompanying drawing forming part of thisspeeitication, in which- AFigure 1 is a transverse vertical section ofmy invention taken 'in the line :t :t of fig. 2.

VFigul'e 2 is a plan or top` view of the same.

Figure 3 is a tranverse vertical section of a port-ion of the same takenin the liney y, tig. 2.

Figure 4, adetached plane or top view of an expandingpulley pertainingto the same.

Figure 5, a front view of fig. 3. Figure 6,'a longitudinal verticalsection of a portion of the same taken in the linex' of iig. 2.

Figure 7, a vertical section ot' a portion of the same, taken in theline z z, tig. 2.

Similar letters of reference indicate like parts. This invention relatesto a new and improved sawing-machine of that class in which a circularsaw is employed.

lt consists in a novel construction of the machine,

as hereinafter fully shown and described, whereby several importantadvantages are obtained, to wit:

First, in the setting of the log to saw. v

Second, in the moving ofthe setting-bar back from the saw.

Third, the adjusting of the knees, so that aproper hearing of the logagainst them may always be obtained.

Fourtlnthe preventing of the beating of the sawmandrel.

Fifth, in an improved belt-slipping mechanism, arranged in connectionwith the -saw-arbor and sawguide, whereby thesaw and guide are drawnfrom the log at the'end of each cnt, and simultaneously with the,raising of the friction-pulley from the drivingbelt.

Sixth, in an improved arrangement or4 application of agnide orgauge-roller, for determining the thickness of the stuff being sawed,said guide 0r gauge-roller heilig used chiefiy in sawing thick stuff.

In the accompanying drawing- A A represent two parallel ways'orgnides,on which a carriage, B, is fit-ted and works, and

C is a setting-bar, which is tit-ted and works on bloc-ks D D, securedtransversely on the carriage.'

lhe log is secured or dogged to this setting-bar,

and the latter is moved on the blocks D D by means cured bevel-pinions GG, which gear into bevel-wheels H H on a shaft, I, which has itsbearings, a u, attached to the carriage B, and on said shaft I, at aboutits center, there is keyed a wheel, J, the periphery of which istoothed, as shown at b, said wheel having a concentric iiange, c,projecting from one side `of it, as shown in figs. 2 and 3.

On the shaft I there is placed, loosely, a bar, K, which is forked, ormade with two sides, so as to straddle the wheel J, as shown clearly intig. 5, an-l within the bar K, to the innersurface of one of the sidesthereof, there is secured, by a pivot-bolt,d, a bar, L, which restsupon` a jaw,vM,- the latter bearing on the upper surface of the fiangec, a projection, d', 0n said bar fitting in a notch in the upper surfaceot'. the jaw M, and keeping the latter in place. (See dotted lines iniig. 3.) g

A similar jaw, N, bears against the under side of the flange c, and thisjaw N is retained in place by resting on a projection, 0, on bar L,(also seen by dotted lines in iig. 3.)

To the inner surface of the opposite side of the bar K there is secured,by a pivot-bolt, j, a pawl, O, which is connected, by a chain, y, with aloaded arm,

P, the latter being fitted on a pivot at the upper end.

of the har L. l

This loaded arm P has a tendency to keep the pawl O elevated and freefrom the tcethfb, of the wheel J, as will be fully understood byreferring to fig. 3.

Q is a forked bar, which straddles the bar K, and is connected to it bypivot-bolts h h.

The lower part of the bar Q extends outward at right angles with theupper part, and hasl a screwrod, R, passing through it, with a. nut, i,on its outer end, the inner end of said screw-rod being tted in the barL.

A single bar, S, is secured to the upper end of the bar Q, and a handle,T, is attached to the upper end of bar S lby a joint, j, the handle Theilig connected by a chain, k, with the loaded arm P, (see moreparticularly fig. 1.) v

The bar Q is provided with two pendent arms, l I, to the lower ends ofone of which there is secured, by a joint, m, a bar, U, having a roller,m', at its lower end, and a bar, V,`liaving a similar roller, u, at it-slower end, is attached, by a joint, o, to the lower end of the other arml'.

The joints m o admit of the bars U V moving in one direction only, asindicated by the arrow in ti". 5.

W is aiblcck, fitted 'm the ooring of the building or in the base ot'the machine, and having an oblique position.

This block is arranged in such a manner ,that it lnay be moved downlevel with the dooring, or raised upward above it, the latter positionbeing given it when it is designed to have the -machine self-setting. lX is a segment slot, made in a plate, Y, which is attached to thecarriage B, and through which the shaft I passes, loosely, the slot Xbeing concentric with the shaft I.

A line, p projects, laterally, from the plate Y, andV extends into theslot X. f y

Z isa stop, which is also itted in slot X, and this stop is connected to'a rod, A', on which a nut, B,.is fitted, (see tig. 1.) By turning thisuut the stopZ may he moved or adjusted in the slot X.

Thisadjustable stop is for the purpose of regulating the movementof thebar K, and determining.'` the length of the feed movement ot' thesetting-baryC.

At the termination of each cut of the saw, and after the log has been'gigged back, the operator pulls the handle 'l in the direction indicatedby thcl arrow 1, (see fil'. 1,) and the jaws M N grasp or clutch thetiange c, and tum the wheel J, aml, consequently, thc shaft I, which,through the' medium of the wheels and pinions H G, turns the screws E E,and, consequently, moves the setting-bar G.

In order to more the setting-bar C back, when a new log is' to be doggedto it, the operator raises the outer emi ot' the handle T, so that aprojection, (LX, on the loaded arm will .press against the bar Q,.aboveits pivot-bolts h It; and the lower end, of the bar S, in consequence ofbeing connected to Q by the rod R, will be shoved toward the setting-barC, and the jaws M N rendered inoperative, so that they will not turn theshaft l, and the loaded end of the arm P, being raised by the upwardmovement ot' the handle T, the paw] O is allowed to engage with theteeth b of' wheel J, and, consequently, when the handle 'l is shovedback in the direction indicated by arrow 2, the shaft I 'will be turnedand the setting-bar C moved back.y

In lieu Yof this arrangement, however, for eiiecting this purpose, thescrews E may be turned by a direct application of power, either throughthe. medium of a crank or key. 1 prefer the former, and I-have one ot'the screws E made tubular, see tig. 7, and have a tubular slide rod, G',fitted therein, the outer end of G' being provided with a. jointedcrank, q, which, when the rod C' is drawn out from the screw, may beadjusted in proper working position, and, when not 're-quired for use,may be adjusted in a straight line and with the rod C', shown within thescrew E, the crank heilig s hoved wit-hin the rod C.

In order to render the device self-setting, all that is required issimply to raise the oblique block \V, so that the rollers m n ot' thebars U V may come in contact with it under the movement of the carriageThe log to be sawed (shown in red) is secured to the knees of thesetting-bar G by means of the usual clogs D'. v

'lhese knees, designated by P', are each provided with an adjustable bar11", which maybe moved further in or out ti'om the knees, by gearing a'and a screw, b', (see tigs. 1 aml 2,) or by ,other suitablev means.

lhe'object ot' these adjustable bars is to always obtain a properbearing ofthe'log against all of the knees, and, with a crooked log,this result could not otherwise he obtained.

' G represents .the circular saw, which is placed upon a mandrel, H',the latter being hollow., and having a spiral fan, I', in one end ot it.'v

The mandrel is also perforated at points withinits bearings, as shown atc', Iig. 1.

Oil being poured within the mandrel, the centrifugal force generated bythe rotation of the same will cause the oil to escape through theperforationsvc, and keepthe bearings perfectly lubricated.

The fan 1 will also canse a current of air to pass through the mandrel,which will keep the latter perfectly cool.

The mandrel H' is driven by a belt, J, from an ex'- panding pulley, K',composed of the sliding parts d. df, which are adjusted 'by aright-and-left screw-rod, L.

' By this means the speed ot' the saw may be regn lated while themachine is running without any ditiicult-y whatever.

This expanding pulley, however, is applicable to other machinery' thansawing-machines, land as it will be the subject of a separateapplication, it is not nec-- essary to describe it further in connectionwith the present invention,

The mandrel H' has two hubs or bosses, c c', upon it, between whichthere is a collar, f', the latter being loose on the mandrel, and havinga pendent-rod, M, attached by a pivot yoke, g', the lower end of the rodM' being stepped loosely in a plate, h.'

N is a lever, which is connected by a har, O', with a sliding plate, P',having an oblique groove, t', made in its lippensurtace, and thependent-rod M' is provided with lateral arm `7",.whicl1 has a block, k',attached, said block being titted in the oblique groove 'i'.

By moving thislever N', it will be seen that a lateral movement will begiven the pendent-rod M', and the mandrel H', moved longitudinally, sothat at the eml of a cut the saw may be drawn from the log, and thelatter gigged back with the carriage, without touching the saw.

Q isa saw-guide, which is fitted in a bearing, and is allowed to slidefreely therein.

This guide is attached lto the outer end ot' the shut arm mf of a bentlever R', the other and longer arm,

n', of said lever being connected to the bar O'.

By this arrangement the guide Q will be drawn from the sawsimultaneously with the drawing of the saw from the log, and I design tohave the idle pulley on the driving-belt connected with the lever N insuch a manner that, when the saw aml its guide are thus moved,the idlepulley will be raised, so as to slackeu the belt, and render the sawinoperative during the gigging back movement ofthe carriage and lock. 1

S is a gauge-roller, which is, titted in an upright frame, T, the lowerend ot' which has a nut, U', that is tit-ted on a screw-shaft, .\V.

This nut has an index, o', projecting from it, which extends over a.graduated plate, p', on the frame of the machine.

The log, in being sawed, bears against this gaugeroller, andAinadjusting the frame 'l" by turning the shaft- W, the roller S maybeset for sawing timber of greater or lesserthickness, as desired.

1n sawing thick timber, the roller S is all that is used for a gauge.

Having thus described my invention,

I claim as new and desire to secure by Letters Patent@- Y v 1. 'lhecombination of the ba-rsQ K L and jaws M N, witlr the dangedwheel 4J,screws E, and gear-4 ing G vH, substantially as described for thepurpose specilied. Y'

2. The arrangement of the jointed bars U V, car. rying the rollers m' n,with reference to the feeding mechanism and the oblique bar W', forreuderilw the device self-setting, as herein shown and described. 3.llhe combination 4otl the handle "l, loadedarm P, and pawl O, with thebars Q K,'and the teeth b ot' the wheel J, all arranged and operating'substantially as described for the purpose specitied.

4. The adjustable crank q, constructed as described,

tted or applied to the screws E, substantially iu the manner as and forthe purpose set forth.

5. The hollow mandrel H', perforated'nt its-boarings, and receiy'ing inits end opposite the saw, the spiral fan 1', as herein described, forthe purpose specified.

6. The combination of the collar j", pendent-rod M', block k', slidingplate l, having the oblique,

groovefi', bar O', und lever N', for the purpose of giving thesaw-umudrel H' :n longitudinal adjustment., substantially us hereindescribed, for the purpose specified.

7. The adjustable gauge-roller S', having its frame T arranged to swingupon the screw-shaft; W' by the nut U, said nut; being provided with theindex O', working:r over the graduated plate p', upon the frame of themachine, us herein described for the purpose specified.

lllUS H. RUSSELL.

Witnesses:

WILLIE T. Rossum., RoswELL DEWEY, Jr.

